The bulk of the luminosity of a thermal AGN such as NGC 5548 comes out at wavelengths shorter the \(\) 1200 (see Figure 2 of [1]}). Since including a correction for internal reddening makes the luminosity of NGC 5548 \(\approx 7\)  times greater (see previous section), this makes the size of the accretion disc \(\sqrt{7} = 2.6\)  times bigger. This is thus in good agreement with the larger disc size found by [2]}) and hence supports the hypothesis that the disc-size problem is simply due to the neglect of internal reddening.
